Kirk agonises over whether to let Seven use the computer to destroy the missile, not knowing if he can trust the mysterious agent. Why doesn't he just have the Enterprise blow the missile up instead?

Great Moment :

Roberta's reaction to the alien typewriter which wrote everything she said was priceless.

Body Count :

Zero

Factoid :

This episode was intended as a spin off series for Gary Seven, but it never appeared.

Plotline

In the 1960s to do historical research, the Enterprise intercepts a Human named Gary Seven who has been transported to the planet by mysterious aliens. But is he there to help Humanity - or destroy it?